Exactly, it's like saying I want OnStar but I don't want my car to connect to them. Or I want a mobile phone but I don't want cellular network to track what cell I'm in so it can actually route calls to my phone.
No, it’s more like as if Tesla would sell mobile phones that would be limited to one cellular network.
You don’t see anyone sell or buy phones like that either – you can just switch the SIM and use it on another network.
If I want to use Apple Music, or Here navigation on my Tesla – instead of Spotify or the integrated navigation – why shouldn’t I be able to?
If I want to replace the firmware with my own (as long as it passes TÜV), why shouldn’t I be able to?
In fact, there are laws that specify I have to be able to disassemble and understand anything I buy, including any software. Any "you may not decompile" or "we will deactivate the car if you decompile the software" clauses are actually illegal in most of the EU.
